The Biosphere: Aquatic Biomes

The video tutorial explores aquatic biomes, focusing on marine and freshwater types. It explains the characteristics of marine biomes, such as ocean coverage and saltwater adaptation. Freshwater biomes, including lakes and ponds, are discussed with emphasis on their biodiversity. The video also highlights estuaries, where freshwater meets saltwater, and their ecological significance.

What percentage of the Earth's surface is covered by oceans?

• 50%

• 60%

• 80%

• 70%

Which of the following factors does NOT vary throughout the oceans?

• Type of salt

• Amount of sunlight

• Pressure

• Water temperature

What is a key characteristic of ponds in freshwater biomes?

• They are always deep.

• They are saltwater bodies.

• Light can reach the bottom.

• They have no plant life.

Which of the following is an example of a freshwater biome?

• Coral reef

• Ocean

• Estuary

• Lake

What is an estuary?

• A deep ocean trench

• A region where freshwater meets saltwater

• A desert oasis

• A type of freshwater lake